Mystery sabre

[Ren Ren]

Originally Posted by Yvain

If I should guess, I could see some resemblance with the Vietnamese guom but not much more.

I also noticed some similarities between this sword and Vietnamese items.
A significant part of the Cham people in Vietnam are Muslims. But I have never seen items from Vietnam decorated with Arabic graphics.
I know that the Chams kept in touch with the language-related Muslims of the Malay Peninsula. Perhaps it is worth looking in the sultanates of the Malay Federation? It has very strong Muslim traditions and has a long history of home to many Chinese artisans.